In this volume, the fourth in the Heart of Christian Faith series, Alister E. McGrath looks at the Holy Spirit, human nature, the doctrine of grace, and the place of the church in the Christian life. Full of stories and helpful illustrations, these easy-to-read devotional books offer spiritual consideration of the difference that our belief in God makes to the way in which we think about ourselves and the world. With one volume remaining, McGrath's series will define "mere Christianity" to a new generation for many years to come.